s/v Jammy

Jammy was a 1979 US Yachts 295 sailboat that graced my life from 2004-2015. She and I had many years of adventures and projects in Seattle, and around Puget Sound. I sold her in 2015 to move up to a larger sailboat, Grace.

When I bought Jammy in 2004, she had basic instruments that were not reliable, original engine, and old sails, but she was sound as can be, sailed fast, and had tons of potential. I set about a 10+ year endeavor to learn more about the inner workings of a sailboat, in particular marine electronics, engines, and electrical system.

Over the years, I did major work on her – everything from completely replacing the entire electrical system, to adding over 50 NMEA 2000 network devices to a brand new network I built from scratch. Many of those adventures are cataloged here on this site, but many are not. Over time I hope to document those that are missing.

Projects

Below is a partial list of projects and updates I did on Jammy over the years.

I’m sure I’m forgetting a few – I intend on adding more details as soon as I can.

Network

Jammy had an extensive NMEA 2000 and otherwise network on her. At the height of the design, there was over a megabyte per minute of data being generated by the NMEA 2000 bus alone. The bus itself had over 40 devices living on it, and that didn’t count the Ethernet, wireless, and non marine focused networks. She was used by multiple vendors including Maretron, DMK, Navico, and SignalK to debug their software/hardware that tended to explode or have issues at these levels of traffic.

Below is an example of the network from 2012. Click for a larger version to zoom in on.

SeaBits.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com

Subscribe to SeaBits

Stay up to date! Get all the latest & greatest posts delivered straight to your inbox